Didn't someone say it looks like a jaw bone?
It's the jaw bone of his dead...
...
wife 
And that's why he won't love us lol
Inquisitor: That's an interesting necklace there, Solas.
Solas: Oh, this? Thank you. I admit it has some sentimental value to me.
Inquisitor: Oh? What manner of creature did it come from?
Solas: Bridgette.
Inquisitor: o-o ...I should go.
EDIT: I just went back a bit and found your post, Lady Lionheart. I'm so sorry to hear about your gerbil. I know it's hard to lose a pet. My dog died almost a year ago.